Helicity cascades in rotating turbulence

AMS Citation:
Mininni, P. D., and A. Pouquet, 2009: Helicity cascades in rotating turbulence. Physical Review E, 79, 026304, doi:10.1103/PhysRevE.79.026304.
Date:2009-02-05
Resource Type:article
Title:Helicity cascades in rotating turbulence
Abstract: The effect of helicity (velocity-vorticity correlations) is studied in direct numerical simulations of rotating turbulence down to Rossby numbers of 0.02. The results suggest that the presence of net helicity plays an important role in the dynamics of the flow. In particular, at small Rossby number, the energy cascades to large scales, as expected, but helicity then can dominate the cascade to small scales. A phenomenological interpretation in terms of a direct cascade of helicity slowed down by wave-eddy interactions leads to the prediction of non-Kolmogorovian inertial indices for the small-scale energy and helicity spectra.
Peer Review:Refereed
Copyright Information:Copyright 2009 American Physical Society.
OpenSky citable URL: ark:/85065/d7n58nmq
Publisher's Version: 10.1103/PhysRevE.79.026304
Author(s):
  • Pablo Mininni - NCAR/UCAR
  • Annick Pouquet - NCAR/UCAR
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